Update: This post was updated at 4:20 p.m. to reflect new comments by President-elect Donald Trump and Boeing CEO Dennis Muilenburg.

WASHINGTON — Just weeks after President-elect Donald Trump fired off angry tweets about manufacturing costs of airplanes produced by Boeing and Lockheed Martin, the CEOs of both companies traveled to Palm Beach, Fla., to meet with their Twitter antagonist.

Boeing CEO Dennis Muilenburg and Lockheed Martin CEO Marillyn Hewson arrived at Trump’s Mar-a-Lago estate Wednesday afternoon. Both of them saw their companies' business practices targeted in the president-elect’s early morning tweets.

“Boeing is building a brand new 747 Air Force One for future presidents, but costs are out of control, more than $4 billion. Cancel order!” Trump tweeted Dec. 6.

Less than a week later, he went after Lockheed Martin’s F-35 program, which produces fleets of fighter jets and sustains thousands of jobs in the Fort Worth area.

“The F-35 program and cost is out of control,” Trump wrote. “Billions of dollars can and will be saved on military (and other) purchases after January 20th.”

After the meeting, Trump said his discussion with the CEOs had gone well, although he declined to say whether he had extracted any specific promises or concessions from Muilenburg or Hewson.

"We're just beginning — it's a dance," Trump told reporters. "It's a little bit of a dance. We're going to get the costs down. And we're going to get it done beautifully."

Muilenburg said he felt "really encouraged by the dialogue" and reiterated that Boeing was committed to making improvements to Air Force One at a cost well below Trump's $4 billion estimate.

"I was able to give the president-elect my personal commitment on behalf of the Boeing Company," Muilenburg said. "This is a business that's important to us. We work on Air Force One because it's important to our country, and we're going to make sure he gets the best capability and that it's done affordably."

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The stealth fighter jets in Lockheed Martin's F-35 program are responsible for more than 146,000 American jobs across 45 states, which is why Congress has been hesitant to cut funding for the program in the past. According to an analysis published by the company, the program uses 78 supplier locations in Texas alone, contributing $3.4 billion to the state's economy.

An annual defense policy bill passed earlier this month included funding for 63 new F-35s, and several members of Congress praised the company in the hours after Trump sent out his tweet.

An aide to Texas Sen. John Cornyn said Cornyn was “confident that the F-35 will be a critical tool for the war fighter for years to come,” while Rep. Kay Granger, whose Fort Worth district includes the Lockheed Martin plant, praised its “talented workers” for keeping the country safe.

White House press secretary Josh Earnest took issue with Trump's claim that more than $4 billion was being invested in the project.

“Some of the statistics that have been, uh, cited, shall we say, don’t appear to reflect the nature of the financial agreement between Boeing and the Department of Defense,” he said.

Over the last several weeks, Trump has proved willing to get involved in the affairs of individual companies. Earlier this month, he announced he had struck a deal with United Technologies, the parent company of the manufacturer Carrier, to save more than a thousand Indianapolis jobs from being moved to Mexico. In exchange, the company would receive millions of dollars in tax credits.

When a union leader for the steelworkers, Chuck Jones, pointed out that only 800 jobs had been saved — and that much of the money Carrier will be saving will go toward further automating the plant, costing jobs in the long run — Trump attacked him, by name, on Twitter.

“Chuck Jones, who is President of United Steelworkers 1999, has done a terrible job representing workers,” he wrote.

"We've got someone who is just about to become the president of the United States, most important job on the planet,” Gerard said. “And he is busy tweeting about a local union president who is in fact a hero."